Not knowing the area at all, I found this on http://www.churchtown.net/Webpages/thingstodo/prehistoric.htm

"Millstreet Country Park Stone Circle:

This stone circle and radial stone enclosure dates back to the late Neolithic and bronze age some 4000 – 5000 years ago. Unusually the park also contains a fullacht fiadh, a bronze age cooking site, this together with the park's many other historical treasures are interpreted by attractive colour on-site information panels and in the park's Audio Visual presentation centre."

Possible hit??